package com.cj.web.before;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.cj.config.AlipayConfig;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Auther: chenjie
 * @Date: 2021/7/15 - 07 - 15 - 16:48
 * @Description: com.cj.web.before
 */
@WebServlet("/pay")
public class PayServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();

        String cid = request.getParameter("cid");
        String uid = request.getParameter("uid");


//        同步请求成功跳转的地址   支付成功跳转到 course_user servlet把这个数据添加到数据库，然后跳到页面渲染
        alipayRequest.setReturnUrl("http://localhost/education/courseUserWeb?method=insertCourseUser&cid="+cid+"&uid="+uid);



//        异步请求成功跳转的地址
//        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

//        http://localhost/education/pay?WIDout_trade_no=11111&WIDtotal_amount=222&WIDsubject=xxx
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = new String(request.getParameter("WIDout_trade_no"));
        //付款金额，必填
        String total_amount = new String(request.getParameter("WIDtotal_amount"));
        //订单名称，必填
        String subject = new String(request.getParameter("WIDsubject"));
        //商品描述，可空
//        String body = new String(request.getParameter("WIDbody"));

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
//                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String result = null;
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }

        //输出
        response.getWriter().print(result);
    }
}
